class Rubocop::CLI

def target_files(args)
  return ruby_files if args.empty?
  files = []
  args.each do |target|
    if File.directory?(target)
      files += ruby_files(target.chomp(File::SEPARATOR))
    elsif target =~ /\*/
      files += Dir[target]
    else
      files << target
    end
  end
  files.map { |f| File.expand_path(f) }.uniq
end